and, using state-of-the-art monitoring technologies, rigorous practices help ensure our operations are safe and clean for our communities and the environment. we're america's natural gas. >>> former u.s. marine jailed in texas. tonight his parents are pleading for help ahead on 360. helping millions of americans retire on their terms. when they want. where they want. doing what they want. ameriprise. the strength of a leader in retirement planning. the heart of 10,000 advisors working with you one-to-one. together for your future. ♪ ♪ ♪ [ male announcer ] while you're getting ready for the holidays, we're getting ready for you. tis the season. for food, for family, and now, something extra -- for you. >>> now a group of researchers are discover iing evidence that some times epi marks may be pass the down through generations. what are they? >> it is where the rub are bber the road. how the code is transcribed is what it is all about. but consider a sentence. and you pick up in the middle of that randomly and manage the meaning of that, the same is true of the code. where and how t